1BF2:
reference: Three-dimensional structure of Pseudomonas isoamylase at 2.2 A resolution., Katsuya Y, Mezaki Y, Kubota M, Matsuura Y, J Mol Biol 1998 Sep 4;281(5):885-97. PMID: 9719642

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).